Gas chromatographic packed column, preparation method thereof and application of packed column

Abstract

The invention provides a gas chromatographic packed column, a preparation method thereof and an application of the packed column. The gas chromatographic packed column comprises a packed column pipe and a packed column stationary phase, the packed column pipe is filled with the packed column stationary phase, the packed column stationary phase comprises a packed column filler, the packed column filler comprises attapulgite, and a preparation method of the packed column filler includes the steps: crushing the attapulgite, and screening the crushed attapulgite to obtain attapulgite powder with particle meshes no less than 200; adding binders into the attapulgite powder, uniformly mixing mixture to prepare small attapulgite balls, and drying the small attapulgite balls at the temperature of 250-350 DEG C; separating the small attapulgite balls in a screening manner to obtain uniform packed column filler with particle meshes of 40-140. According to the novel gas chromatographic packed column, kinds of the gas chromatographic packed column are enriched, the gas chromatographic packed column is applied to analysis of gas dissolved in transformer oil, and the gas dissolved in the transformer oil can be sensitively, rapidly and accurately detected by one chromatographic packed column.

Description

technical field [0001] The invention relates to the field of analytical chemistry, in particular to a gas chromatographic packed column and a preparation method thereof, and the application of the gas chromatographic packed column in the analysis of transformer oil dissolved gas. Background technique [0002] Chromatography is a separation and analysis method that is widely used in the detection and analysis of petroleum, chemistry, environment, biology, food and many other fields. The chromatographic column in chromatography is directly related to the separation effect and detection sensitivity, and the preparation of chromatographic column is an important part of chromatographic analysis. Packing is an important feature of the chromatographic column, which determines the basic characteristics of the chromatographic column. Whether the chromatographic peaks can be separated depends first on the packing. Packed column is one of the more commonly used chromatographic columns...

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Problems solved by technology

[0005] The present invention solves the problem that there are few types of stationary phase fillers commonly used in existing gas chromatography packed columns, and the corresponding types of commonly used gas chromatography packed columns are also less. Considering that the chromatographic packed columns require that the adsorbent-type stationary phase fillers have the ability to be used at high temperatures use, large adsorption capacity, and good thermal stability; the inventors found that attapulgite is chemically inert after treatment, has a large specific surface area, good adsorption, and has the effect of molecular sieves. These characteristics make it suitable for chromatographic filling. Column adsorbent filler; and attapulgite has the characteristics of being a catalyst carrier, which can be used as a carrier for gas chromatography packed columns after surface treatment; based on the above findings, the present invention provides a new gas chromatography packed column and its preparation The method, wherein the stationary phase includes a packed column filler prepared from attapulgite, the gas chromatographic packed column provided by the invention is used for gas chromatographic analysis, and is especially suitable for analyzing dissolved gas in transformer oil, and can solve the problem of using a chromatographic column in the prior art. The problem of low accuracy in analyzing dissolved gas in transformer oil with a single packed column

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